Zenfolio for still image delivery and sometimes proofs as well (at photos.forbesconrad.com); Vimeo for video proofing; custom user at ftp.forbesconrad.com for non-JPEG image formats and video files.

It’s too bad uploading via FTP isn’t possible with most media hosts; none of the browser-based upload forms I’ve used resume well after a network interruption (the internet is less than reliable here, particularly when large uploads are involved).